The Worm Shaft, cataloged under National Stock Number 3040-00-991-6741, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-991-6741 |
| Primary Part Number | 10930650 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Keyway Depth | 0.076 INCHES MINIMUM STEAM INLET IN |
| Keyway Depth | 0.093 INCHES MAXIMUM BACK LINING IN |
| Shaft Location | BOTH ENDS OF WORM |
| FSC Application Data | TRAVERSING MECHANISM,MACHINE GUN |
| Teeth Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM |
| Worm Body Length | 2.000 INCHES NOMINAL IN |
| Worm Thread Lead | 0.3938 INCHES NOMINAL IN |
| Thread Length | 0.582 INCHES NOMINAL SECOND END SEVENTH PORTIONUNABLE TO DECODE IN |
| Material Document and Classification | QQ-S-624,FS4617,FS4620,FS8617,FS8620 OR FS8720 FED SPEC ALL MATERIAL RESPONSES |
| Worm Pitch Diameter | 1.687 INCHES NOMINAL IN |
| Worm Outside Diameter | 1.932 INCHES MINIMUM AND 1.936 INCHES MAXIMUM IN |
| Straight Unthreaded Section Diameter | 0.125 INCHES NOMINAL SECOND END FIFTH PORTION IN |
| Straight Unthreaded Section Diameter | 0.873 INCHES MINIMUM AND 0.874 INCHES MAXIMUM SECOND END THIRD PORTION IN |
| Straight Unthreaded Section Diameter | 1.250 INCHES NOMINAL FIRST END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 1.250 INCHES NOMINAL SECOND END FIRST PORTION IN |
| Straight Unthreaded Section Diameter | 1.287 INCHES MINIMUM AND 1.295 INCHES MAXIMUM FIRST END THIRD PORTION IN |
| Straight Unthreaded Section Diameter | 1.377 INCHES MINIMUM AND 1.377 INCHES MAXIMUM FIRST END FOURTH PORTION IN |
| Straight Unthreaded Section Diameter | 1.377 INCHES MINIMUM AND 1.378 INCHES MAXIMUM FIRST END SECOND PORTION IN |
| Straight Unthreaded Section Diameter | 1.377 INCHES MINIMUM AND 1.378 INCHES MAXIMUM SECOND END SECOND PORTION IN |
| Taper Largest Diameter | 0.873 INCHES MINIMUM AND 0.874 INCHES MAXIMUM SECOND END FOURTH PORTION IN |
| Taper Largest Diameter | 0.874 INCHES MAXIMUM BOSS IN |
| Unthreaded Section Keyway Depth | 0.173 INCHES MINIMUM AND 0.179 INCHES MAXIMUM SECOND END THIRD PORTION IN |
| End Similarity | NOT IDENTICAL |
| Taper Length | 0.125 INCHES NOMINAL SECOND END FOURTH PORTIONUNABLE TO DECODE IN |
| Keyway Width | 0.188 INCHES MINIMUM AND 0.188 INCHES MINIMUM STEAM INLET0.204 INCHES MAXIMUM SECOND END SIXTH PORTION IN |
| Keyway Width | 0.204 INCHES MAXIMUM BACK LINING IN |
| Screw Thread Series Designator | UNABLE TO DECODE |
| Surface Treatment | OIL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 10930650 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-00-991-6741 is a Worm Shaft, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-991-6741 has 1 manufacturer part number on file: 10930650 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 10930650: Keyway Depth: 0.076 INCHES MINIMUM STEAM INLET IN; Keyway Depth: 0.093 INCHES MAXIMUM BACK LINING IN; Shaft Location: BOTH ENDS OF WORM; FSC Application Data: TRAVERSING MECHANISM,MACHINE GUN. 28 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 3040-00-991-6741 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.